I am just about to finish uploading a short video which demos the DPS201 in action, actually to use the phrase in action is a gross overstatement. I merely turned the output on while recording. In any case, over the past few days I've seen some issues that need to be addressed in coming weeks:
- The analog circuitry must be analysed with respect to stability. Current mode buck converters are generically unstable with uncompensated error amplifiers. this leads to all sorts of problems. In this case I'm seeing oscillations of the output and in the most severe cases noise being spewed out that affects the USART communication.
- The opamps (TL072) have some offset error which must be calibrated out in firmware.
- The software needs to be slightly more robust when plugging and unplugging the device.
Hopefully we can manage to solve these quickly.